Natthayut Nithithananont defeated Teerapat Khantiweerawat 6-4 6-4 in the M25 Chiang Rai 1 q32 on hard. The upset overturned the form book — Teerapat Khantiweerawat came in leading the head-to-head 1–0. Natthayut Nithithananont claimed a first win over Teerapat Khantiweerawat in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2025-11-23 | M15 Phan Thiet 1 | Q64 | hard | Teerapat Khantiweerawat | 6-2 7-6(5) |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.